Shaving without a shaving brush has a few advantages beyond taste and liking. If you are making straight contours around the beard a shaving cream lathered with a brush can give too much lather over a too large area. With a shaving cream that works without brushing you have greater control of the amount of lather.
You do not need to use a shaving brush, but simply massage the shaving cream directly on the skin with your hand and you will have lather and a good glide. When travelling it might be nice to have a moisturizing and lubricating brushless shaving cream as an alternative to bringing a big shaving brush. Read more on how to use brushless shaving creams.